The 10B20NP.22 Laser Line Non-Polarizing Beamsplitter is insensitive to the polarization of an incoming beam. Unlike broadband dielectric beamsplitters, which are extremely polarization sensitive, this beamsplitter provides a true 50/50 split regardless of the incoming polarization. The polarization components are matched to within 5%. Near zero absorption in these dielectric beamsplitters results in true 50/50 split of the beam and high damage threshold. They are especially useful for higher power applications where cemented cube beamsplitters may fail. This 25.4 mm diameter beamsplitter is manufactured using a high-precision BK 7 substrate to minimize wavefront distortion. A slight wedge in the substrate helps eliminate back reflections to the laser. The front surface is coated with a multilayer all-dielectric non-polarizing beamsplitter coating optimized for 488 nm. The back surface is coated with a multilayer dielectric antireflection coating to minimize surface reflection losses and eliminate ghost images.

• 直径

  25.4 mm

• 增透膜

  488 nm

• 材料

  Grade A N-BK7

• 表面质量

  15-5 scratch-dig

• 入射角

  45°±3°

• 镀膜代码

  NP.22

• 表面平面度

  ≤λ/10 at 632.8 nm over the clear aperture

• 耐用性

  MIL-C-675C, moderate abrasion million cycles

• 倒角

  0.5 mm face width

• 倒角公差

  45° ±15°

• 清洁

  See How to Clean Optics

• 通光孔径

  > central 80% of diameter

• 损伤阈值

  500 W/cm2 & 0.5J/cm2 10 ns 1064 nm

• 直径公差

  +0/-0.13 mm

• 方向

  Beam should enter surface marked with an arrow

• 厚度

  6.1 mm  

• 厚度公差

  ±0.38 mm

• 透射

  50 ±5%, independent of polarization

• 偏振

  S- and P-polarization components matched to within 5%

• 波前畸变

  ≤λ/10 at 632.8 nm over the clear aperture

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10 b20np。非偏振光束分离器对入射光束的偏振不敏感。不像宽带介质波束分离器，这是非常偏振敏感，这个波束分离器提供了一个真正的50/50的分裂，不管传入偏振。极化分量匹配在5%以内。在这些介质分束器中，接近于零的吸收导致了光束的50/50分裂和高损伤阈值。它们特别适用于高功率应用，胶结立方体波束分离器可能会失败。这种直径25.4毫米的波束分离器是使用高精度bk7衬底制造的，以最小化波前畸变。衬底上的一个小楔有助于消除对激光的反射。前表面涂覆了一层多层全介电非极化波束分离器涂层，优化后达到488 nm。背面涂有多层介质防反射涂层，减少表面反射损失，消除虚影。